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  4. How can I Handle character 'a' and character 'A' in pretranslate Message

How can I Handle character 'a' and character 'A' in pretranslate Message

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  • P Offline
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    phanindra varma
    wrote on last edited by
    #1

    Hi,,,, I have one GUI i.e,SDI application which is inherited from Form view I want to add Key maaping to that GUI. For that when i press 'a' i have to focus on One button when i am press 'A' then i have to focus on another button. //There is a problem in KEYDOWN MessageMap related to my application. So,I use PreTranslate message to handle key events.but when i press 'a'it will treat that as 'A'. so,please help me in this Regard.

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    • P phanindra varma

      Hi,,,, I have one GUI i.e,SDI application which is inherited from Form view I want to add Key maaping to that GUI. For that when i press 'a' i have to focus on One button when i am press 'A' then i have to focus on another button. //There is a problem in KEYDOWN MessageMap related to my application. So,I use PreTranslate message to handle key events.but when i press 'a'it will treat that as 'A'. so,please help me in this Regard.

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      Naveen
      wrote on last edited by
      #2

      I think if u handle WM_CHAR instead of WM_KEYDOWN, you can identify 'a' and 'A'.

      nave [OpenedFileFinder]

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      • N Naveen

        I think if u handle WM_CHAR instead of WM_KEYDOWN, you can identify 'a' and 'A'.

        nave [OpenedFileFinder]

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        phanindra varma
        wrote on last edited by
        #3

        Thanks for the Reply... But i have some problem when using WM_CHAR and WM_KEYDOWN message maps. So,Can i Handle it in "PreTranslateMessage".. any suggestions.......

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        • P phanindra varma

          Thanks for the Reply... But i have some problem when using WM_CHAR and WM_KEYDOWN message maps. So,Can i Handle it in "PreTranslateMessage".. any suggestions.......

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          Naveen
          wrote on last edited by
          #4

          yes.

          nave [OpenedFileFinder]

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          • P phanindra varma

            Thanks for the Reply... But i have some problem when using WM_CHAR and WM_KEYDOWN message maps. So,Can i Handle it in "PreTranslateMessage".. any suggestions.......

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            CPallini
            wrote on last edited by
            #5

            You may use GetKeyState(VK_SHIFT) [^] to distinguish between lower case and upper case keys in PreTranslateMessage. :)

            If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
            This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
            [My articles]

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            • C CPallini

              You may use GetKeyState(VK_SHIFT) [^] to distinguish between lower case and upper case keys in PreTranslateMessage. :)

              If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
              This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
              [My articles]

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              Naveen
              wrote on last edited by
              #6

              CPallini wrote:

              You may use GetKeyState(VK_SHIFT) [^] to distinguish between lower case and upper case

              And when caps Lock Key is on? :-D

              nave [OpenedFileFinder]

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              • N Naveen

                CPallini wrote:

                You may use GetKeyState(VK_SHIFT) [^] to distinguish between lower case and upper case

                And when caps Lock Key is on? :-D

                nave [OpenedFileFinder]

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                CPallini
                wrote on last edited by
                #7

                Make a try before arguing ;P (i.e. CAPS LOCK key down makes GetKeyState(VK_SHIFT) returning the same value it returns whenever SHIFT key is held down) :)

                If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                [My articles]

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                • C CPallini

                  Make a try before arguing ;P (i.e. CAPS LOCK key down makes GetKeyState(VK_SHIFT) returning the same value it returns whenever SHIFT key is held down) :)

                  If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                  This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                  [My articles]

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                  Naveen
                  wrote on last edited by
                  #8

                  CPallini wrote:

                  Make a try before arguing

                  But I tried now. GetKeyState(VK_SHIFT) is not giving the same value when shift key is down and when CAPS LOCK key is on. Did you actually check like this..? if( GetKeyState(VK_SHIFT)&0x8000 )

                  nave [OpenedFileFinder]

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                  • N Naveen

                    CPallini wrote:

                    Make a try before arguing

                    But I tried now. GetKeyState(VK_SHIFT) is not giving the same value when shift key is down and when CAPS LOCK key is on. Did you actually check like this..? if( GetKeyState(VK_SHIFT)&0x8000 )

                    nave [OpenedFileFinder]

                    C Offline
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                    CPallini
                    wrote on last edited by
                    #9

                    Well, actually it is not the same value, but bit 0 contains the meaningful info in both cases, hence GetKeyState(VK_SHIFT) & 0x0001 should do the trick. :)

                    If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                    This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                    [My articles]

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                    • C CPallini

                      Well, actually it is not the same value, but bit 0 contains the meaningful info in both cases, hence GetKeyState(VK_SHIFT) & 0x0001 should do the trick. :)

                      If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                      This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                      [My articles]

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                      N Offline
                      Naveen
                      wrote on last edited by
                      #10

                      CPallini wrote:

                      hence GetKeyState(VK_SHIFT) & 0x0001 should do the trick.

                      I dont think so. Cause the low bit indicates the key is toggled. Suppose the application is started and at that state if( GetKeyState(VK_SHIFT) & 0x0001) - > will return false. Then I press shift key and release it. After that if( GetKeyState(VK_SHIFT) & 0x0001) - > will return true. Then if i again press shift and release, if( GetKeyState(VK_SHIFT) & 0x0001) - > will return false. So basically, checking the 0 bit have no meaning in the case of shift key. 0th have use only in the case of toggle keys such as CAPS LOCK, NUM LOCK etc...

                      nave [OpenedFileFinder]

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                      • N Naveen

                        CPallini wrote:

                        hence GetKeyState(VK_SHIFT) & 0x0001 should do the trick.

                        I dont think so. Cause the low bit indicates the key is toggled. Suppose the application is started and at that state if( GetKeyState(VK_SHIFT) & 0x0001) - > will return false. Then I press shift key and release it. After that if( GetKeyState(VK_SHIFT) & 0x0001) - > will return true. Then if i again press shift and release, if( GetKeyState(VK_SHIFT) & 0x0001) - > will return false. So basically, checking the 0 bit have no meaning in the case of shift key. 0th have use only in the case of toggle keys such as CAPS LOCK, NUM LOCK etc...

                        nave [OpenedFileFinder]

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                        CPallini
                        wrote on last edited by
                        #11

                        Again, make a test. (I did). :)

                        If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                        This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                        [My articles]

                        P 1 Reply Last reply
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                        • C CPallini

                          Again, make a test. (I did). :)

                          If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                          This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                          [My articles]

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                          phanindra varma
                          wrote on last edited by
                          #12

                          Thanks... GetKeyState() works fine.... Regards varma

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                          • P phanindra varma

                            Thanks... GetKeyState() works fine.... Regards varma

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                            CPallini
                            wrote on last edited by
                            #13

                            phanindra varma wrote:

                            Thanks...

                            You're welcome.

                            phanindra varma wrote:

                            GetKeyState() works fine....

                            Sure. :)

                            If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                            This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                            [My articles]

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